/Engine/Source/Runtime/Core/Public/Containers/Map.h
The time taken is O(N) in the number of pairs.
A pointer to the key associated with the specified value, or nullptr if the value isn't contained in this map. The pointer is only valid until the next change to any key in the map.
const KeyType * FindKey ( [ValueInitType](API\Runtime\Core\Containers\TMapBase\ValueInitType) Value ) const